Serena Williams has chipped in for the I Touch Myself Project, a breast cancer awareness project for which women go topless and sing part of the Divinyls hit “I Touch Myself”: a tribute to Divinyls lead singer Chrissy Amphlett, who passed away in 2013 from breast cancer. Williams captions the video:

Yes, this put me out of my comfort zone, but I wanted to do it because it’s an issue that affects all women of all colors, all around the world. Early detection is key - it saves so many lives. I just hope this helps to remind women of that.

The project invites you to gram yourself with the tag #ITouchMyselfProject. Breast Cancer Awareness Month starts Monday. Get that shit checked!!